G11B 5/315
Shield layers on both sides of the main pole
Official title: {Shield layers on both sides of the main pole, e.g. in perpendicular magnetic heads}
G11B5/315 (Shield layers on both sides of the main pole) appears on 635 US grants and 473 published applications in this corpus.
Search patents in G11B- Granted patents
- 635
- Published applications
- 473
- Assignees
- 40
- Inventors
- 647
- Latest grant
- 6 Oct 2026
Filings by year
| Year | Granted patents | Published applications |
|---|---|---|
| 1987 | 1 | 0 |
| 1988 | 0 | 0 |
| 1989 | 0 | 0 |
| 1990 | 1 | 0 |
| 1991 | 1 | 0 |
| 1992 | 0 | 0 |
| 1993 | 1 | 0 |
| 1994 | 0 | 0 |
| 1995 | 0 | 0 |
| 1996 | 0 | 0 |
| 1997 | 0 | 0 |
| 1998 | 0 | 0 |
| 1999 | 0 | 0 |
| 2000 | 0 | 0 |
| 2001 | 0 | 0 |
| 2002 | 0 | 3 |
| 2003 | 0 | 1 |
| 2004 | 2 | 1 |
| 2005 | 2 | 14 |
| 2006 | 7 | 12 |
| 2007 | 7 | 17 |
| 2008 | 5 | 30 |
| 2009 | 14 | 36 |
| 2010 | 15 | 23 |
| 2011 | 38 | 44 |
| 2012 | 61 | 39 |
| 2013 | 76 | 29 |
| 2014 | 66 | 19 |
| 2015 | 43 | 25 |
| 2016 | 41 | 16 |
| 2017 | 35 | 22 |
| 2018 | 29 | 12 |
| 2019 | 27 | 22 |
| 2020 | 48 | 24 |
| 2021 | 40 | 17 |
| 2022 | 15 | 10 |
| 2023 | 19 | 10 |
| 2024 | 18 | 22 |
| 2025 | 17 | 17 |
| 2026 | 6 | 8 |
By publication year. Applications have been published since 2001. 2026 runs to 8 Oct.
Recent patents
- Hard disk drive and write heads having refilled structures at side edges of an assist device6 Oct 2026US 12,755,755 B1Headway Technologies, Inc.
- Write head designs with refill materials on a back edge of an assist device for improved write head reliability and performance6 Oct 2026US 12,755,756 B1Headway Technologies, Inc.
- Perpendicular magnetic recording writer with tunable pole side bridge design11 Aug 2026US 12,706,113 B2Headway Technologies, Inc.
- Perpendicular magnetic recording head equipping a spin torque oscillator element with an electric current in side gaps14 Apr 2026US 12,603,103 B2Headway Technologies, Inc.
- Magnetic heads having low magnetic coercivity (Hc) and high saturated magnetic flux density (Bs) in ferromagnetic (FM) layer(s) or shield(s) with minimized saturation3 Mar 2026US 12,567,438 B2Western Digital Technologies, Inc.
- Magnetic head and magnetic recording device24 Sep 2026US 2026/0290385 A1Kabushiki Kaisha Toshiba
- Perpendicular Magnetic Recording Head Equipping A Spin Torque Oscillator Element With An Electric Current In Side Gaps9 Jul 2026US 2026/0196242 A1Headway Technologies, Inc.
- Asymmetric Side Gap Writer Fabricated By Ion-Beam Etching (IBE) / Ion-Beam Deposition (IBD) Process For Aerial Density Capability (ADC) Improvement28 May 2026US 2026/0148749 A1Headway Technologies, Inc.
- Magnetic Recording Writer With Improved Side Shield14 May 2026US 2026/0134881 A1Headway Technologies, Inc.
- Triangular-Shaped Main Pole Design With Natural Leading Edge Tapering For Maximizing The Aerial Density Capacity In Perpendicular Magnetic Recording30 Apr 2026US 2026/0120714 A1Headway Technologies, Inc.
Most cited
By later US patents
- Method and system for providing a magnetic transducer having a high moment bilayer magnetic seed layer for a trailing shield197US 8,582,241 B1Western Digital (Fremont), LLC · 2013
- Method for providing a perpendicular magnetic recording (PMR) head191US 8,015,692 B1Western Digital (Fremont), LLC · 2011
- Systems and methods for providing perpendicular magnetic writers having gradient magnetic moment side shields171US 8,582,238 B1Western Digital (Fremont), LLC · 2013
- Write element for perpendicular recording in a data storage system168US 7,239,478 B1Western Digital (Fremont), LLC · 2007
- MgO based perpendicular spin polarizer in microwave assisted magnetic recording (MAMR) applications167US 9,230,571 B1Headway Technologies, Inc. · 2016